Amazon offers the Thermaltake ST0014U BlacX Duet eSATA USB Dual Hard Drives Docking Station for low $38.99 plus FREE shipping for Prime members or on orders of $35+.

What makes this deal hot:
You save $21 off the price! That's the lowest price we could find. This has a 4.4 out of 5 star rating with over 229 reviews.

What this does & Why you need it:
Read & Write 2 Hard Drives simultaneously (Note: Device's eSATA must support the "port multiplier" function to see both drives, USB will automatically detect)
Supports All 2.5" & 3.5" SATA Hard Drives up to 2TB (per slot)
Supports eSATA Transfer Speed up to 3.0 Gbps, USB 2.0 Transfer Speed up to 480 Mbps
Windows & Mac OS Compatible
Rapid Data Access & Exchange w/ Single eSATA or USB Cable Connection